An image illustrating the calculation of overtime, featuring time charts in a digital environment.

April 1, 2026

How to Calculate Overtime: The Definitive Guide and Solution from inallow.com

Learn step-by-step how to calculate your employeesʼ overtime and avoid mistakes. Streamline this crucial process with inallow.comʼs time and attendance software, ensuring accuracy, legal compliance, and efficiency for your business.

Accurate calculation of overtime is essential for any company seeking to ensure compliance with the law, fairness toward its employees, and flawless financial management. An error in this process can not only result in significant financial penalties but also affect employee morale and the organization’s reputation. At inallow.com, we understand the complexity of time and attendance management, which is why we’ve developed a comprehensive solution that simplifies this and other challenges.

The Importance of Accurate Overtime Calculation

Overtime refers to the time an employee dedicates to their work beyond the established workday. Proper compensation for this time is an employee’s right and a legal obligation for the company. An efficient time tracking system is the foundation for ensuring that every extra minute worked is recorded and paid appropriately. It is not just about complying with regulations, but also about fostering a fair and transparent work environment.

In Spain, the Workers’ Statute (Article 35) and collective bargaining agreements are the main pillars governing the matter of overtime. It is vital to know:

  • Overtime limit: Generally, 80 hours per year, excluding those compensated by time off or due to force majeure.
  • Compensation: Overtime may be compensated financially or with equivalent or longer rest periods. The method must be agreed upon, and in the absence of an agreement, compensation will be provided in the form of rest time.
  • Overtime rate: It may never be less than the regular hourly rate. Many collective bargaining agreements establish specific surcharges (e.g., 75%, 100%, or more for night shifts or holidays).

Step-by-Step Guide to Calculating Overtime

To perform an accurate calculation, follow these steps:

  1. Track Work Hours: The first and most crucial step is to maintain an accurate work hour log for each employee. This includes start and end times, as well as breaks. Time and attendance software like that from inallow.com automates this process, eliminating manual errors and ensuring the data’s legal validity.

  2. Identify Regular Hours: Determine the agreed-upon workday (e.g., 8 hours/day, 40 hours/week). Anything exceeding this limit is overtime.

  3. Calculate the Regular Hourly Wage:

    • Obtain the employee’s gross monthly salary.
    • Add the prorated bonus payments (if not already included).
    • Divide the total by the number of regular hours worked in the month (or the calculation period).
    • Regular Hourly Wage = (Monthly Gross Wage + Prorated Bonus Payments) / Monthly Regular Hours
  4. Identify Overtime: Subtract the regular hours from the total hours worked according to the time sheet.

    • Overtime = Total Recorded Hours - Regular Hours
  5. Apply the Corresponding Premium: Consult the applicable collective bargaining agreement or company agreement to determine the premium percentage for overtime. This may vary depending on whether the hours are daytime, nighttime, on holidays, or on weekends. If there is no agreement, the overtime rate cannot be lower than the regular hourly rate.

  6. Calculate Overtime Pay:

    • Overtime Pay = Regular Hourly Wage x (1 + % Premium)
    • Total Overtime Pay = Overtime Pay x Number of Overtime Hours

    Simple Example:

    • Regular hourly wage: €12
    • Overtime premium (according to collective agreement): 50%
    • Overtime pay: €12 * (1 + 0.50) = €18
    • Employee worked 10 hours of overtime during the month.
    • Total to be paid for overtime: €18 * 10 = €180

Challenges in Manual Calculation and How inallow.com Solves Them

Manual calculation of overtime is error-prone, time-consuming, and can lead to workplace friction. Companies often face:

  • Lack of Accuracy: Errors in manual recording or data entry.
  • Non-compliance: Difficulty adapting to changes in labor laws or collective bargaining agreements.
  • High Administrative Costs: Time spent on manual management and calculation.
  • Lack of Transparency: Employee distrust regarding the accuracy of payments.

This is where inallow.com’s time and attendance software shines. Our platform is designed to:

  • Automate Time Tracking: With multiple clock-in options (web, mobile, biometric), we ensure accurate and legally compliant recording of every clock-in and clock-out.
  • Automatically Calculate Overtime: Set up your collective bargaining agreement rules once, and the system will calculate overtime with complete accuracy, applying the correct surcharges and distinguishing between different types of overtime.
  • Ensure Legal Compliance: Our solution is constantly updated to align with current legislation, minimizing the risk of penalties.
  • Simple Integration: Export overtime data directly to your payroll system, simplifying the payment process and reducing administrative burden.
  • Comprehensive Staff Management: Beyond overtime, inallow.com manages vacation, absences, leave, and visitor tracking, offering a 360° view of the workforce and access control.

Key Benefits of inallow.com for Your Company

By integrating inallow.com into your operations, your company will experience:

  • Unmatched Accuracy: Eliminate human error and ensure every calculation is perfect.
  • Guaranteed Regulatory Compliance: Rest easy knowing you meet all legal requirements regarding time tracking and overtime.
  • Operational Efficiency: Free up valuable time for your HR team to focus on strategic tasks.
  • Transparency and Trust: Foster good relationships with your employees by providing them with clear and accessible records.
  • Cost Optimization: Avoid penalties and optimize time management for better decision-making.
  • Security and Access Control: The visitor log feature adds an extra layer of security and professionalism to your organization, effectively managing the entry and exit of external visitors.

Don’t let the complex overtime calculation be a headache for your company. With inallow.com, transform a tedious process into a simple, accurate, and fully automated task. Invest in a solution that gives you peace of mind, efficiency, and a fairer work environment.

Ready to simplify time, attendance, and visitor management at your company? Visit inallow.com today and request a free demo of our time tracking and visitor registration software. Discover how our platform can take your organization’s productivity and compliance to the next level. Let technology work for you!

María Calvo García

María Calvo García

Head of Time & Attendance Compliance and Labor Law Compliance

I design time management and workforce compliance systems, aligning daily operations with current regulations, thereby transforming time tracking into a strategic management tool that enhances transparency, productivity, and decision-making in human resources.

Did you find this article helpful?

Share it with your team or on your social media.

The blog for saving time and money with digital onboarding